INSTALLATION AND WIRING
46
(5)
Motor
overload protection
When using the electronic overcurrent protection function as motor overload protection,
set the rated motor current in Pr.9 "electronic thermal O/L relay".
When connecting two or more motors to the inverter, install external thermal relays for
individual motors.
Reference: Motor overload protection characteristics
0 50 100 150 180200
240
180
120
60
Operation time (s)
50% setting
(Note 1, 2)
100% setting
(Note 2)
(Note 1) When you set the 50% value (current
value) of the rated inverter output current.
(Note 2) The % value denotes the percentage of
the current value to the rated inverter
output current, not to the rated motor current.
(Note 3) This characteristic curve will be described
even under operation of 6Hz or higher
when you set the electronic overcurrent
protection dedicated to the Mitsubishi
constant-torque motor.
30Hz or higher
(Note 3)
Inverter output current (%)
(% to rated inverter output current)
Electronic overcurrent
protection for transistor
protection
20Hz
10Hz
Protection activating range
Range on the right of characteristic curve
Normal operating range
Range on the left of characteristic curve
2.3.7 Instructions for compliance with the European standards
(The products conforming to the Low Voltage Directive carry the CE mark.)
(
1
)
EMC Directive
1) Our view of transistorized inverters for the EMC Directive
A transistorized inverter is a component designed for installation in a control box
and for use with the other equipment to control the equipment/device. Therefore,
we understand that the EMC Directive does not apply directly to transistorized
inverters. For this reason, we do not place the CE mark on the transistorized
inverters. (The CE mark is placed on inverters in accordance with the Low
Voltage Directive.) The European power drive manufacturers' organization
(CEMEP) also holds this point of view.
2) Compliance
We understand that the transistorized inverters are not covered directly by the
EMC Directive. However, the EMC Directive applies to machines/equipment into
which transistorized inverters have been incorporated, and these machines and
equipment must carry the CE marks. Hence, we prepared the technical
information "EMC Installation Guidelines" (information number BCN-A21041-
202) so that machines and equipment incorporating transistorized inverters may
conform to the EMC Directive more easily.
3) Outline of installation method
Install an inverter using the following methods:
* Use the inverter with an European Standard-compliant noise filter.
* For wiring between the inverter and motor, use shielded cables or run them
in a metal piping and ground the cables on the inverter and motor sides with
the shortest possible distance.
* Insert a line noise filter and ferrite core into the power and control lines as
required.
Full information including the European Standard-compliant noise filter
specifications are written in the technical information "EMC Installation
Guidelines" (BCN-A21041-202). Please contact your sales representative.
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